Mechanical signal-horn.



J. S. MUIR.

MECHANICAL SIGNALHORN.

' APPLICATION FILED MAR. I6, 1915- Patented June 27, 1916.

' 2 SHEETS-SHEET 1.

q. s. MU|R. MECHANICAL SIGNAL HORN.

APPLICATION FILED MAR-16,1915.

1,188,673. Patented June 27,1916.

2 SHEETS-SHEET 2- JOHN STANLEY MUIR, 015 DETROIT, MICHIGAN.

MECHANICAL SIGNAL-HORN.

To all whom it may concern:

Be it known that I, JOHN STANLEY MUIR, a citizen of the United States, residing at Detroit, in the county of \Vayne and State of Michigan, have invented new and useful Specification of Letters Patent.

Improvements in Mechanical Signal-Horns,

sive of production, will produce a maximum volume of sound.

A further object of the invention is to provide a signal horn which is adapted to be rotated for operation by amoving part of the motive plant of the vehicle, and which may be thrown into and out of action atwill.

A still further object of the invention is to provide a novel construction of signal horn, embodying fixed and rotating parts, lncluding sound producing devices, adapted to be operated by the rotation of the rotary part, together with means whereby the device as a whole may be adjusted into and out of engagement with the moving part of the motor mechanism, to render the horn operative or inoperative at will.

The invention consists of the features of construction, combination and arrangement of parts herein fully described and claimed, reference being had to the accompanying drawings in which Figure 1 is a perspective view of a portion of an automobile, showing one mode of application of the invention. Fig. 2 is a plan view of the horn, on an enlarged scale, parts of the horn appearing in section. Fig. 3 isa face view of the horn per .96. Fig. 4 is'a vertical section on the line 1- 1 of Fig. 2. Figs. 5 and 6 are detail views of parts of the sounding. mechanism. 7 In carrying my invention into practice, I provide a horn comprising a casing 1 consisting of front and rear sections 2 and 3, formed of sheet metal or other suitable ma.- terial. The two sections of the casing have portions 4 and 5 which relatively converge in an outward direction and form a sounding chamber 6 in which is disposed a disk or-diaphragm 7. 4

The disk or. diaphragm 7 is composed of a thin circular piece of steel or other similar material, capable of vibration to produce a maximum volume of sound. The marginal Patented June 27, 1916.

Application filed March 16 1915. Serial No. 14,627.

portion of this diaphragm extends beyond the chamber 6 and is clamped between suitable gaskets 8 disposed between the same and angular clamping members 9 and 10, which are integral with the converging portions at and 5 of the casing sections, the parts referred to being firmly united by rivets or other suitable fastening devices 11.

The casing and parts carried thereby are mountedfor rotary motion as hereinafter described, and the clamping members 9 and 10 are extended beyond the diaphragm to provide a channeled rim 12 receiving a ring 13 which is securely clamped therein. This ring may be made of wood or other suitable material, and provides a friction wheel or surface which is adapted for engagement with a moving part of the engine or power plant of the vehicle, whereby the rotary portion of the device maybe rotated.

The casing section 2 is provided with a sound outlet 14, while. the casing section 3 is provided with a tubular portion or hub 15 which is secured to and mounted upon a wheel or rotary head 16 provided with a bearing sleeve 17 surface 18-. This toothed Wheelis mounted to revolve upon a shaft or axle 19 carried by a hanger arm'or bracket 20,-to which it is secured by a set screw or other suitable fastening means 21. The toothed wheel constitutes one of the elements of the sounding mechanism, which consists, in addition to the diaphragm and said toothed wheel, of a gravity dog or pawl 22 adapted to engage and cooperate with the teeth of said wheel, which dog or pawl is connected with a vibrating hammer or striker 23, pivotally mounted upon a bifurcated arm 24:, formed upon and disposed at an angle to the outer end of the shaft or axle 19.

The hanger or bracket arm 20' is rigidly connected with a shaft or axle 24', j ournaled in one or more supporting bracket members 25, which may be mounted at any suitable point upon the vehicle, and connected with the arm 20 or shaft 24 is an operating member 26, which may be in the form of a pin, lever or other suitable form of device, whereby the shaft 24 and arm 20 may be rocked by hand or foot power to swing the and an annular toothed horn in an arcuate path, to throw it into and tion, and which is adapted to permit the same to be adjusted for the purpose of throwing the horn into operative position.

' In practice, the rock shaft 24 may be mounted by the bracket or brackets upon the casing of the automobile or motor boat,

or upon some other suitable part of the vehicle, and the device may be so arranged that the friction surface 13 may be thrown intoand out of engagement with either the fly Wheel of the engine or a. belt driving. a fan or other part, so that the rotary portion of the device may be set into action for the purpose of operating the sounding mechanism.

It will be evident from the foregoing description that thecasing or body of the hornv will, when the horn is thrown into action, be revolved with the wheel 16 upon the axle 19, andthat as it revolves the toothed surface of the wheel causes the weighted pawl or dog 22 to ride in and out over the teeth feur.

of the wheels and in so doing to vibrate or swing the hammer 23 rapidly back and forth, the degree of rapidity depending upon the speed of rotation of the horn. The hammer when thus vibrated strikes the steel diaphragm 7 and thus produces the desired sound or signal, which will be of ample' volumeat low speed rotation and will increase in volume and intensity as the speed of rotation increases. It will be understood of course, that the surface 13 of the rotary body is normally maintained out of contact with the part of the power plant with which it is thrown into engagement for operation, and that by tilting the device on the shaft 24 as an axis the surface 13 may be thrown into and out of engagement with the moving operating element. As shown in Fig. 1, the moving operating element may be a belt 28 which transmits motion from the motor to a cooling fan, and the operating lever 26 vmay extend through the dashboard of the at a comparatively low cost, while it is.

adapted to produce as high a degree of volume as desired.

I claim l. A mechanical horn comprising relatively. stationary and rotary members, a diaphragm upon the rotary member, a 'vibrating hammer upon the stationary member arranged to strike said diaphragm, and means upon the rotary member for vibrating said hammer.-

2. A' mechanical horn comprising a stationary member, a rotary member, a vibratory diaphragm carried by the rotary mem ber, a-vibratory hammer supported by the stationary member, and means operated by the rotary member for vibrating said hammer.

3. A mechanical horn comprising a stationary member, a rotary member, a vibratory diaphragm carried by the rotary member, an axle pin carried by the stationary member, a. vibratory hammer carried by said pin, a dog carried by the pin, and a toothed surface on the rotary member for communicating vibratory motion to the dog.

4. A mechanical horn comprising 'a stationary member forming an axle, a rotary member mounted to turn thereon, 3. diaphragm carried by said rotary member, a toothed surface on the rotary member, and a vibratory device pivotally supported on the stationary member and adapted to be vibrated by said toothed surface for engagement with the diaphragm.

5. A mechanical horn comprising a' stationary member forming an axle, a horn body revolubly mounted thereon, a diaphragm carried by the horn body, a surface upon the horn body whereby rotary motion from a source of power may be communicated thereto, a vibratory diaphragm upon the horn body, a hammer upon the stationary member for contact with said diaphragm, and means upon the horn body for vibrating said hammer.

6. A mechanical horn comprising a stationary member, a rotary member, a vibratory diaphragm carried by the rotary member, a toothed surface upon the rotary member, a movable hammer supported by the stationary member, and a member operated by said toothed surface for transmitting vibratory motion to said hammer.

7. A mechanical horn comprising a rotary member, a toothed ring thereon, said rotary member being provided with a friction surface, a diaphragm carried by the said rotary member, a stationary member, a dog or pawl upon the stationary member and adapted to be vibrated by the toothed ring on the rotary member, and a vibrating hammer operated by said dog.

In testimony whereof I afiix my signature in presence of two witnesses.

JOHN STANLEY MUIR.

Witnesses: Y

' HARRY C. MILLIGAN,

RAYMOND M. PLAMPE. 

